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Find the middle term in the expansion of :`\ (x/3+9y)^(10)`

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Given
`(frac{x}{3}+9 y)^{10}`
n is an even number.
the middle term is `(frac{10}{2}+1)` th, i. e. , 6th term.
...
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RD SHARMA-BINOMIAL THEOREM-Solved Examples And Exercises
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